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“The Knowledge Library”
Knowledge for All, without Barriers…
An Initiative by: Kausik Chakraborty.
“The Knowledge Library”
Knowledge for All, without Barriers……….
Knowledge for All, without Barriers…
(Q) A man sold two watches for Rs 525 each. On one he gains 10% and on the other he loses 15%. His profit or loss in the whole transaction is. Solution: = ((100×-5)-2×10×15)/110+85 = (-500-300)/195 = -4.10% ie Loss= …
(Q)A sold an article to B at the profit of 25%.B sold it to C loss of 10% and C sold it to D at the profit of 20%.If D paid Rs 27 then how much A paid to buy …
Profit and Loss Definition:- Marked price(M.P): The normal price of the thing without any discount. Cost price(C.P): The price at which an article is purchased is called its cost price. Selling price(S.P): The price at which an article is sold is called its …
(Q)Three pipes A, B and C can fill a tank in 6 hours, 9 hours and 12 hours respectively. B and C are opened for half an hour, then A is also opened. The time taken by the three pipes …
(Q1)The population of a town increases by 5% every year. If the present population is 9261, The population 3 Years ago was. Solution: F.Q=I.Q×M.F Where I.Q=Initial Quantity F.Q=Final Quantity M.F=Multiplying Factor Now F.Q=I.Q×M.F 9261=I.Q×(105/100)×(105/100)×(105/100) I.Q=(9261×100×100×100)/(105×105×105) =8000 Ans CONCEPT:[इस Type के Question …
(Q1)Mohan gives 35% of the money he had to his wife and gave 50% of the money he had to his sons. The remaining amount of 11,250 he kept for himself. what was the total amount of money Mohan had? …
(Q1)In an election, there were only two candidates. one of the candidates secured 40% of votes and is defeated by the other candidate by 298 votes. The total number of votes polled is. Solution: Let total votes=100x Now, 60x-40x=298 =>20x=298 …
FOR EXAMPLE: (Q1) A candidate who scores 30% fails by 5 marks, while another candidate who scores 40% marks get 10 more then minimum pass marks. The minimum marks required to pass are. Solution:Let total marks=100x Now, 100x×(30/100)+5=100x×(40/100)-10 =>30x+5=40x-10 =>30x-40x=-10-5 …
(Q1)Due to increase in the price of sugar by 20%.the consumption reduces by 30%.then find the percentage effect on total expenditure from it. Solution: %Effect=(16×100)/100 =16% Ans CONCEPT:[यदि Price and Quantity/Consumption दोनों में change हो रहा हो तो Price and …
For Example: The price of sugar having gone down by 10%,sharad can buy 6.2Kg more for Rs.279.The difference between the original and the reduced price(per Kg) is: And another example is: The price of sugar is decreased by 25%.Therefore a family increases its …
(Q1)Due to a decrease in price per kg. of sugar by 25% by how much percent, a housewife should increase quantity so that total expenditure remains same. Solution: Let initial price=Rs. 100 Now, % Increase=(25/75)×100 =33.33% Ans Rough: New price=100×(100-25)/100 …
IMPORTANT PERCENTAGE PROBLEM CONCEPTS SHORTCUT TRICKS FOR COMPETITIVE EXAM (Q1)If Ravi salary is 25 % more than Raju’s salary the percentage by which Raju’s salary is less then Ravi salary. Solution: BY TRICK Required percentage=(25/100+25)×100) =(25/125)×100 =20% Ans (Q2)If A’s income is …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) A computer is a device that computes or process large amounts of data in various forms. It permits users to store and process information quickly and automatically. A …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) Information Technology Information technology, also called “IT’ in short form is a common term that includes all forms of technology used to create, store, exchange, and use information …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) Intellectual Property rights has vital role in all sector and has become a crucial factor for investment decisions by many companies. India is now TRIPS-compliant. This is an …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) In Indian scenario, extremism activities are increasing rapidly. The scale of the extremists operations is massive and consequently these activities have perilous impact on nation’s social, economic and …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) Land is precious for any country and used by people for productivity and as a source of food, for place to live, for wood, for place to work. …
Paper – III (Technology, Economic Development, Bio-diversity, Environment, Security and Disaster Management) Crime and terrorism are critical issues for security officials and investigators all around the world. Earlier, the problems of organized crime and terrorism were considered as separate phenomena …